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riscv/hwprobe: add zicfilp / zicfiss enumeration in hwprobe

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Add enumeration of the zicfilp and zicfiss extensions in the hwprobe syscall.

Reviewed-by: Zong Li <zong.li@sifive.com>
Signed-off-by: Deepak Gupta <debug@rivosinc.com>
Tested-by: Andreas Korb <andreas.korb@aisec.fraunhofer.de> # QEMU, custom CVA6
Tested-by: Valentin Haudiquet <valentin.haudiquet@canonical.com>
Link: https://patch.msgid.link/20251112-v5_user_cfi_series-v23-20-b55691eacf4f@rivosinc.com
[pjw@kernel.org: updated to apply; extend into RISCV_HWPROBE_KEY_IMA_EXT_1; clean patch description]
Signed-off-by: Paul Walmsley <pjw@kernel.org>
This commit is contained in:
Deepak Gupta 2026-01-25 21:09:55 -07:00 • committed by Paul Walmsley
parent 462a94fb8a
commit 30c3099036
2 changed files with 6 additions and 2 deletions
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3
arch/riscv/include/uapi/asm/hwprobe.h
View file

@ -86,6 +86,7 @@ struct riscv_hwprobe {
#define RISCV_HWPROBE_EXT_ZICBOP (1ULL << 60)
#define RISCV_HWPROBE_EXT_ZILSD (1ULL << 61)
#define RISCV_HWPROBE_EXT_ZCLSD (1ULL << 62)
#define RISCV_HWPROBE_EXT_ZICFILP (1ULL << 63)
#define RISCV_HWPROBE_KEY_CPUPERF_0 5
#define RISCV_HWPROBE_MISALIGNED_UNKNOWN (0 << 0)
@ -114,6 +115,8 @@ struct riscv_hwprobe {
#define RISCV_HWPROBE_KEY_VENDOR_EXT_MIPS_0 14
#define RISCV_HWPROBE_KEY_ZICBOP_BLOCK_SIZE 15
#define RISCV_HWPROBE_KEY_IMA_EXT_1 16
#define RISCV_HWPROBE_EXT_ZICFISS (1ULL << 0)
/* Increase RISCV_HWPROBE_MAX_KEY when adding items. */
/* Flags */

5
arch/riscv/kernel/sys_hwprobe.c
View file

@ -126,6 +126,7 @@ static void hwprobe_isa_ext0(struct riscv_hwprobe *pair,
EXT_KEY(isainfo->isa, ZICBOM, pair->value, missing);
EXT_KEY(isainfo->isa, ZICBOP, pair->value, missing);
EXT_KEY(isainfo->isa, ZICBOZ, pair->value, missing);
EXT_KEY(isainfo->isa, ZICFILP, pair->value, missing);
EXT_KEY(isainfo->isa, ZICNTR, pair->value, missing);
EXT_KEY(isainfo->isa, ZICOND, pair->value, missing);
EXT_KEY(isainfo->isa, ZIHINTNTL, pair->value, missing);
@ -195,7 +196,7 @@ static void hwprobe_isa_ext1(struct riscv_hwprobe *pair,
* doesn't have.
*/
for_each_cpu(cpu, cpus) {
/* struct riscv_isainfo *isainfo = &hart_isa[cpu]; */
struct riscv_isainfo *isainfo = &hart_isa[cpu];
/*
* Only use EXT_KEY() for extensions which can be
@ -203,7 +204,7 @@ static void hwprobe_isa_ext1(struct riscv_hwprobe *pair,
* configuration, as no other checks, besides presence
* in the hart_isa bitmap, are made.
*/
/* Nothing here yet */
EXT_KEY(isainfo->isa, ZICFISS, pair->value, missing);
}
/* Now turn off reporting features if any CPU is missing it. */